<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style></style>
  </head>

  <body>
    <div class="parent" style="height: 400px">
      <div class="child" style="width: 200px; height: 200px; background-color: aqua"></div>
    </div>
    <div class="parent" style="height: 400px">
      <div class="child" style="background-color: aqua">
        <p>123456789</p>
      </div>
    </div>
  </body>
</html>
